Suction adapter



FIG. 1 is a top perspective view of a suction adapter showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an opposite side view thereof;

FIG. 5 is an end view thereof;

FIG. 6 is an opposite end view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Broken line portions form no part of the claimed design. 

CLAIM The ornamental design for a suction adapter, as shown and described. 